Mote is a Chrome extension that can be used to record audio to insert into Google Slides, into Google Documents, and into Google Classroom. In the following videos I provide demonstrations of how to use Mote in all three of those G Suite tools.
Installing Mote & Using it Google Slides
In this video I demonstrate how to install Mote and how to activate it in your Google account.
How to record audio in Google Docs.
How to record audio in Google Classroom.